How to Program one STM32 MCU using another STM32 MCU (It is connect to some Flash Memory which contains .hex file which need to be flashed) over USART?

[Tesla DeLorean · Accepted solution]

Try AN3155

https://www.st.com/content/ccc/resource/technical/document/application_note/51/5f/03/1e/bd/9b/45/be/CD00264342.pdf/files/CD00264342.pdf/jcr:content/translations/en.CD00264342.pdf

[SayanSeth]

Okay. Thank you. :) Let me try this.